2 years ago

3. What role did the government play in either supporting or suppressing African Americans'/Blacks'

Chemistry

1 answer:

9966 [12]2 years ago

4 0

Slavery played a big role in this. the confederacy allowed slavery while the union was oppose to it.

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What mass of HBO2 is produced from the<br> combustion of 139.5 g of B2H6?<br> Answer in units of g.

aliina [53]

Answer:

$m_{HBO_2}=441.8gHBO_2$

Explanation:

Hello there!

In this case, since the combustion of B2H6 is:

$B_2H_6+3O_2\rightarrow 2HBO_2+2H_2O$

Thus, since there is 1:2 mole ratio between the reactant and product, the produced grams of the latter is:

$m_{HBO_2}=139.5gB_2H_6*\frac{1molB_2H_6}{27.67gB_2H_6} *\frac{2molHBO_2}{1molB_2H_6} *\frac{43.82gHBO_2}{1molHBO_2}$

$m_{HBO_2}=441.8gHBO_2$

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2 years ago

What is science? Why do you think science is important?

ryzh [129]

Answer:

Science is the study of the physical or material world. Science is important because it can answer questions about new ideas and can advance technologies

Explanation:

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3 years ago

How many grams of O2(g) are needed to completely burn 15.6 g of C3H8(g)?

alexdok [17]

15.6gC3H8*44.1gC3H8*32gO2=11.32

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3 years ago

Why is copper a pure substance? a. because it is an element b. because it is a compund c. because it is a homogenous mixture

Step2247 [10]

Answer:

a. because it is an element

Explanation:

its pure because it only has one type of atom, making it an element

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2 years ago

What is the molarity of a 500.0 ml solution containing 0.75 moles of solute?

wariber [46]

M=mol/L
M=.75/.5
M=1.5

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3 years ago